i got a 2009 Honda civic lx coupe automatic I need some help tryna figure out a problem feels like my car is down shifting or what not when I'm not accelerating the car but it is perfect fine when its in neutral or at a complete stop car idles fine n everything but jus when I am driving n let go of the pedel **** vibrates shakes or feels like I'm down shifting what do you guys think is the problem?

 

Check your motor mounts, the passenger one especially. When it starts to go it causes vibrations and thumping noises.

 

Feels like it's downshifting isn't specific enough. We need to know specifically what is happening.